Alg/Geo III - 4.7 Complex Numbers

Match

Use the discriminant of f(x)=0 and the sign of the leading coefficient of f(x) to match each quadratic function with its graph.

f(x)=x²-2x

f(x)=-x²+2x-1

f(x)=x²-2x+2

• f(x)=x²-2x

• f(x)=-x²+2x-1

• f(x)=x²-2x+2

Fill in the Blanks

Solve -x²-25=0

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Solve x²-4x+8=0

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Solve 8x²+5=12x

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Find a possible pair of integer values for a and c so that the equation

ax²+3x+c=0

has two imaginary solutions. Then write the equation.

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The ball leaves the juggler's hand with a vertical velocity of 40 feet per second. Does the ball reach the height of 30 feet? 20 feet?